KR102546893B1 - SYSTEM FOR SEQUENTIAL CONTROL OF NETWORK SWITCH FOR PoE-BASED IoT SYSTEM AND METHOD THEREOF - Google Patents

Abstract

The present invention relates to a network switch sequential control system and method for a PoE-based IoT system, and more particularly, when switching network connection and power supply of an IoT device operating based on PoE through a network switch, a plurality of the IoT Switching in the network switch is sequentially controlled so that the temporary overload does not occur so that the operation of the network switch or the IoT device does not become unstable or fail due to temporary overload caused by simultaneous switching of devices by the network switch. By doing so, it is intended to provide a network switch sequential control system and method for a PoE-based IoT system that prevents the instability and failure.

Description

Network switch sequence control system for PoE-based IoT system and its method

The present invention relates to a network switch sequential control system and method for a PoE-based IoT system, and more particularly, to a network connection and power supply of an Internet of Things (IoT) device operating based on PoE (Power over Ethernet) through a network switch. When switching supply, switching in the network switch is performed so that the operation of the network switch or IoT device does not become unstable or fail due to temporary overload caused by simultaneous switching of a plurality of IoT devices by the network switch. It is intended to provide a network switch sequential control system and method for a PoE-based IoT system that prevents the instability and failure by sequentially controlling so that the temporary overload does not occur.

The hardware of information devices and the software technologies necessary for the operation and management of these devices, ICT (Information and Communication Technology) that collects, produces, processes, preserves, transmits and utilizes information using these technologies, as well as attaching sensors to objects IoT, a technology that exchanges data in real time through the Internet, is deeply embedded in our lives.

The current IoT was a sensor or control-based system of low-speed communication, but in the future, a complex and diverse IoT system that connects video and audio devices that require high-capacity transmission will emerge.

The ICT or IoT based system must be connected to the network through wired or wireless. So far, interest and technology for wireless connection have been the mainstream, but eventually, since wireless connection also has limitations in that power must be connected, wire-based IP networks rather than wireless networks are used for high-capacity real-time transmission such as multimedia. is economical and competitive. A wired network-based ICT or IoT-based system can build a system that guarantees more reliability and stability compared to a wireless network system using wireless communication.

PoE is a technology that transmits DC power along with data on a CAT5 Ethernet line. It is specified as a standard by the IEEE, and two standards, 802.3af and 802.3at, are specified. In other words, PoE can supply data and power with a single wire to build an IoT system concisely and efficiently.

Power supply to a device through PoE is applied to a wired IP network-based system due to its convenience, and in particular, network switches supporting large-capacity power supply are being developed and used.

However, when power is supplied to the load side simultaneously in the conventional system, equipment failure or damage occurs due to transient current. To solve this problem, sequential power control is performed using a separate product such as a sequential power supply There was an inconvenience that had to be done.

That is, network switches that support PoE have not been equipped with sequential network connection and power control functions, so it is necessary to introduce a function that sequentially performs network connection and power supply.

Therefore, in the present invention, when switching the PoE network connection of IoT devices operating based on PoE through a network switch, by sequentially controlling so that temporary overload caused by simultaneous switching of a plurality of IoT devices to the network switch does not occur, We would like to suggest a way to prevent the operation of a network switch or IoT device from becoming unstable or failing.

Next, the prior inventions existing in the technical field of the present invention will be briefly described, and then the technical details to be achieved by the present invention to be differentiated from the prior inventions will be described.

First, Korean Patent Registration No. 2038328 (2019.10.30.) relates to a multi-channel LED power control system that performs logic-based LED power control using an Ethernet network. This is a prior invention related to a multi-channel LED power control system that freely controls LED lighting without hardware restrictions by logically connecting it to a hardware port that controls LED lighting and controlling the LED control port from a logical point of view of software.

That is, the prior invention applies the Ethernet communication method to control several lighting controllers at once through a network that shares one Ethernet switch, which is not only convenient but also increases hardware complexity when using an asynchronous communication method. Can reduce A multi-channel LED power control system is described.

However, in the present invention, when switching PoE network connections of IoT devices operating based on PoE in a network switch, sequential control is performed so that temporary overload due to simultaneous switching of each IoT device to the network switch does not occur. The present invention has significant structural differences.

In addition, Korean Patent Registration No. 2023718 (2019.09.16.) relates to a network sequential power supply, a control circuit for controlling the turn-on operation of a relay through a control terminal when power is input from a power input terminal; a relay power supply receiving power for driving the relay from the control circuit; An NC terminal, a NO terminal, a common terminal, and a first coil, wherein the common terminal is connected to a negative terminal of a plurality of power output terminals, and the first coil is connected between the relay power supply unit and the control terminal. relay; a contactor power switch having one side connected to the power input terminal; and a contactor switch and a second coil, wherein the second coil is connected between the other side of the contactor power switch and the NC terminal, and the contactor switch is connected to a positive terminal of the power input terminal and a positive terminal of the power output terminal. It is a prior invention related to a network sequential power supply including a plurality of magnetic contactors each connected therebetween.

That is, the prior invention describes a network sequential power supply capable of maintaining normal power output even when a failure or failure of a control circuit occurs.

On the other hand, since the present invention sequentially controls switching in a network switch in order to prevent temporary overload that may occur when a plurality of IoT devices operating based on PoE are simultaneously switched to the network switch, the prior invention and the present invention There are significant structural differences.

The present invention was created to solve the above problems, and is a network switch for PoE-based IoT systems that can perform sequential control with a time difference when switching network connection and power supply of IoT devices operating based on PoE. It aims to provide

In addition, in order to prevent temporary overload that may occur when a plurality of IoT devices operating based on PoE are simultaneously switched to the network switch, the network switch pre-sets power consumption or data usage of each IoT device. An object of the present invention is to provide a system and method capable of sequentially controlling the switching of each IoT device based on the switching order and switching delay time.

In addition, the present invention monitors the current, voltage, temperature, etc. of each port of the network switch for the PoE-based IoT system, and cuts off the power supply if the current, voltage, temperature, etc. do not satisfy the criteria as a result of the monitoring, Another object is to provide a system and method for preventing the operation of an IoT device from becoming unstable or failing.

Another object of the present invention is to provide a system and method capable of remotely controlling a plurality of IoT devices through a network switch for the PoE-based IoT system in a remote user terminal or control server.

A network switch sequential control system for a PoE-based IoT system according to an embodiment of the present invention includes a sequential switching controller for controlling PoE switching with time differences for each IoT device; and a switching unit that switches the PoE network connection of each IoT device based on the control of the sequential switching control unit, wherein the switching is set based on power usage, data usage, or a combination thereof for each IoT device. It is characterized in that it is performed sequentially according to the order.

In addition, the system further includes an order setting unit for setting a switching order for PoE network connection for each IoT device, wherein the order setting unit is configured individually or in groups according to power usage or data usage for each IoT device. It is characterized in that it further comprises setting a sequence for switching the PoE network connection.

In addition, the system calculates the total power usage or total data usage of each IoT device, and compares the calculated total power usage or total data usage with the power usage or data usage of the individual IoT devices, PoE for each individual or group. Characterized in that it further includes; a delay time setting unit for setting an IoT device switching delay time for switching network connections.

In addition, the system includes a power module for converting commercial power applied from the outside into DC power and converting the converted DC power to generate DC power of different sizes; and a PoE unit including a PSE for supplying the generated DC power to each of the IoT devices and a network driver for transmitting and receiving bi-directional data with each of the IoT devices, wherein the sequential switching control unit is configured to: It is characterized in that the switching is controlled to supply DC power of different sizes generated by the power module through the PoE unit according to the DC power used in the power module.

In addition, the system, a sensing unit for measuring the voltage, current and temperature supplied to each port; and a monitoring unit that monitors whether the measured voltage, current, and temperature of each port satisfy a preset criterion, and as a result of the monitoring, the measured voltage or current of each port does not satisfy the preset criterion. If not, it is characterized in that the supply of power to a specific port that does not satisfy the above criteria is cut off.

In addition, a sequential control method for a network switch for a PoE-based IoT system according to an embodiment of the present invention includes, in a network switch for a PoE-based IoT system, a sequential switching control step of controlling PoE switching to each IoT device with a time difference; and a switching step of switching the PoE network connection of each IoT device based on the control, wherein the switching is sequentially performed according to a switching order set based on power usage, data usage, or a combination thereof for each IoT device. It is characterized in that it is performed as.

In addition, the method further includes an order setting step of setting a switching order for PoE network connection for each IoT device in the network switch for the PoE-based IoT system, wherein the order setting step is for each IoT device. It is characterized in that it further comprises setting an order for switching the PoE network connection individually or by group according to power usage or data usage.

In addition, the method calculates the total power usage or total data usage of each IoT device in the network switch for the PoE-based IoT system, and calculates the total power usage or total data usage and the power usage or data of each IoT device. In preparation for usage, a delay time setting step of setting an IoT device switching delay time for switching individual or group PoE network connections; characterized in that it further comprises.

In addition, the method may include, in the network switch for the PoE-based IoT system, converting commercial power applied from the outside into DC power, and converting the converted DC power to generate DC power of different sizes; and supplying the generated DC power of different sizes to the respective IoT devices according to the DC power used by the respective IoT devices, while performing bi-directional data transmission and reception with each of the IoT devices. to be

In addition, the method may include a sensing step of measuring voltage, current, and temperature supplied to each port in the network switch for the PoE-based IoT system; And a monitoring step of monitoring whether the measured voltage, current, and temperature for each port satisfy a preset criterion, wherein the network switch for the PoE-based IoT system, as a result of the monitoring, for each port measured When the voltage or current does not satisfy a predetermined criterion, it is characterized in that it further comprises cutting off the power supply of a specific port that does not satisfy the criterion.

As described above, according to the network switch sequential control system and method for a PoE-based IoT system of the present invention, in the process of switching PoE network connections of a plurality of IoT devices operating based on PoE in a network switch for a PoE-based IoT system, By switching with a time difference based on the switching order and switching delay time set in advance based on the power usage or data usage of each IoT device, due to temporary overload that occurs when the plurality of IoT devices are simultaneously switched to the network switch There is an effect that can prevent the operation of the network switch or IoT device from becoming unstable or a failure from occurring.

In addition, the present invention monitors the current, voltage, temperature, etc. for each port of the network switch for the PoE-based IoT system, and as a result of the monitoring, if the current, voltage, temperature, etc. do not satisfy the preset criteria, the power supplied to the corresponding port By blocking, there is an effect of preventing damage or failure of a network switch for a PoE-based IoT system or an IoT device.

1 is a conceptual diagram showing the entire use environment of a network switch sequential control system for a PoE-based IoT system according to an embodiment of the present invention.
2 is a diagram for explaining a network switch sequential control process for a PoE-based IoT system according to an embodiment of the present invention.
3 is a diagram showing the configuration of a network switch for a PoE-based IoT system according to an embodiment of the present invention in more detail.
4 is a diagram illustrating sequential control of a network switch for a PoE-based IoT system according to an embodiment of the present invention.
5 is a waveform diagram illustrating a relationship between an amount of power and time when sequentially switching a PoE network connection for each IoT device in a network switch for a PoE-based IoT system according to an embodiment of the present invention.
6 is a diagram for explaining order setting for switching a PoE network connection in a network switch for a PoE-based IoT system according to an embodiment of the present invention.
7 is a diagram for explaining calculation of a switching delay time in a network switch for a PoE-based IoT system according to an embodiment of the present invention.
8 is a flowchart illustrating in detail the operation process of a network switch sequential control method for a PoE-based IoT system according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a network switch sequential control system and method for a PoE-based IoT system of the present invention will be described in detail. Like reference numerals in each figure indicate like members. In addition, specific structural or functional descriptions of the embodiments of the present invention are merely exemplified for the purpose of explaining the embodiments according to the present invention, and unless otherwise defined, all terms used herein, including technical or scientific terms These have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this specification, it should not be interpreted in an ideal or excessively formal meaning. It is preferable not to

1 is a conceptual diagram showing the entire use environment of a network switch sequential control system for a PoE-based IoT system according to an embodiment of the present invention.

As shown in FIG. 1A, the system of the present invention includes a network switch 100 for a PoE-based IoT system and a plurality of IoT devices 200. In addition, a user terminal 300 and control for controlling and managing the operation of each IoT device 200 connected to each IoT device 200 connected through the network switch 100 for the PoE-based IoT system through a network The server 400 may be further included.

Here, in the present invention, as shown in FIG. 1B, the user terminal 300 sets an operation sequence, the control server 400 performs sequential control commands, and the network switch 100 for the PoE-based IoT system Sequential switching can be performed for each IoT device. In addition, the control server 400 may be installed in the network switch 100 for the PoE-based IoT system. In this case, the user terminal 300 sets an operation sequence, and the PoE control server 400 is built-in. The network switch 100 for the based IoT system may perform sequential control commands and sequential switching for each IoT device.

The PoE supplies power from Power Sourcing Equipment (PSE) defined in IEEE 802.3af and IEEE 802.3at to a Powered Device (PD) connected through an RJ45 connector and a Cat5 cable, and transmits and receives data. do. In the present invention, a PSE is provided in the network switch 100 for the PoE-based IoT system, and a PD is provided in the IoT device 200.

The network switch 100 for the PoE-based IoT system is an L2 switch that supports PoE and can be connected to an upper switch (SW) (eg, L3) or another L2 switch (SW), and is provided with a plurality of ports, , A plurality of IoT devices 200 operating based on PoE are connected to each port through a cable, and network connection and power supply of the IoT device 200 are switched through the cable. That is, power used by the IoT device 200 is supplied as well as PoE switching that simultaneously transmits and receives data.

At this time, since the network switch 100 for the PoE-based IoT system is connected to various types of IoT devices 200 through cables for each port, it is sensitive to power, may cause mutual interference, and multiple IoT devices ( 200) is switched to the network switch 100 for the PoE-based IoT system, the operation of the network switch 100 for the PoE-based IoT system or each IoT device 200 becomes unstable or there is a risk of failure due to temporary overload It was high.

In order to solve this problem, the present invention, when switching the PoE network connection of each IoT device 200 operating based on PoE in the network switch 100 for the PoE-based IoT system, sets a time difference for each IoT device 200 By switching the network connection and power supply, it is possible to prevent operation instability or failure that may occur due to temporary overload.

For example, when a sequential control command for setting the operation sequence of the user terminal 300 or switching the PoE network connection of each IoT device 200 is received from the control server 400, the network switch for the PoE-based IoT system ( In step 100, network connection and power supply are sequentially switched for each IoT device 200 through a previously set switching order and switching delay time based on power usage or data usage of each IoT device 200. At this time, the sequential switching will be described in more detail with reference to FIGS. 3 to 6 .

In addition, the network switch 100 for the PoE-based IoT system monitors current, voltage, and temperature in real time for each port to which each IoT device 200 is connected through a current sensor, a temperature sensor, an ammeter, a voltmeter, and the like. and compares the monitoring result with a preset standard, and if the current, voltage, and temperature of each port monitored does not satisfy the standard, the function of cutting off the power supplied to the corresponding port prevents damage to the equipment. or prevent errors.

The IoT device 200 is various lights, microphones, cameras, sensors, speakers, home appliances, etc. provided in a predetermined space such as a home or office, and each port provided in the network switch 100 for the PoE-based IoT system. is connected through a cable, receives power from the network switch 100 for the PoE-based IoT system and operates, and at the same time transmits and receives data with the network switch 100 for the PoE-based IoT system through the cable. .

In addition, the IoT device 200 transmits a current operating state to the user terminal 300 or control server 400 connected to the network through the network switch 100 for the PoE-based IoT system, or the user terminal 300 or It can be driven by receiving a control command from the control server 400 .

Meanwhile, the network switch sequential control process for the PoE-based IoT system will be described in detail with reference to FIG. 2 as follows.

2 is a diagram for explaining a network switch sequential control process for a PoE-based IoT system according to an embodiment of the present invention.

As shown in FIG. 2, the present invention provides a switching order setting process for PoE network connection for each IoT device, a switching delay time setting process for PoE network connection for each IoT device, and a sequential PoE switching process for each IoT device. consists of including

First, the process of setting the switching order for PoE network connection for each IoT device will be described. The network switch 100 for the PoE-based IoT system transmits and receives data to and from each IoT device 200, and checks power usage, data usage (or average traffic volume), etc. for each IoT device 200 (①) .

In addition, the network switch 100 for the PoE-based IoT system sets a switching order for PoE network connection for each IoT device 200 according to power usage, data usage, etc. for each IoT device 200 (②), Stores and manages the set switching order in memory.

That is, the network switch 100 for the PoE-based IoT system connects to the network and supplies power to each IoT device 200 that operates based on PoE individually or by group in the order of power usage or data usage of each IoT device 200 from the largest. The order for switching is set, and the order for network release and power cut-off is set individually or by group in order of decreasing power consumption or data consumption. Through the above process, the order for switching the PoE network connection for each IoT device is set, stored, and managed.

Subsequently, the switching delay time setting process for each IoT device's PoE network connection will be described. The network switch 100 for the PoE-based IoT system performs order setting for switching the PoE network connection for each IoT device, and then checks the total power usage or total data usage of each IoT device 200 (③) .

And the network switch 100 for the PoE-based IoT system sets a switching delay time for PoE network connection for each IoT device according to the total power usage or total data usage of all IoT devices 200 (④), and sets the The switching delay time for PoE network connection for each IoT device is stored in memory and managed.

That is, the network switch 100 for the PoE-based IoT system compares the total power usage or data usage of all IoT devices 200 and the power usage or data usage of individual IoT devices 200, so that the power usage or data usage is The switching delay time for PoE network connection of each IoT device 200 operating based on PoE is set by a method such as setting a longer switching delay time for many IoT devices. For example, when performing switching for PoE network connection for each IoT device, when a delay time of 30 seconds is set in total, the network switch 100 for the PoE-based IoT system determines the power usage or data usage for each IoT device. Accordingly, the total delay time of 30 seconds is distributed and calculated. (See FIG. 6) Through the above process, the switching delay time for PoE network connection for each IoT device is set, stored, and managed.

Meanwhile, the network switch 100 for the PoE-based IoT system, which sets the switching order for PoE network connection for each IoT device and sets the switching delay time for PoE network connection for each IoT device, is the IoT device 200. It always detects whether or not is connected, and whenever the IoT device 200 is connected to an unused port, the switching sequence and switching delay time for PoE network connection can be updated, stored, and managed.

Next, the sequential PoE switching process for each IoT device will be explained. After the order for switching the PoE network connection is set and the switching delay time is set, the network switch 100 for the PoE-based IoT system checks whether PoE switching is required for each IoT device 200 (⑤). .

Subsequently, if PoE switching for the IoT device 200 is required, the network switch 100 for the PoE-based IoT system stores in memory, the switching sequence for PoE network connection for each IoT device under management, and the switching delay time. Based on this, PoE switching for each IoT device is sequentially performed (⑥). This completes the sequential PoE switching process for each IoT device.

Accordingly, when the PoE network connection of each IoT device 200 is sequentially switched in the network switch 100 for the PoE-based IoT system, the plurality of IoT devices 200 connect the network switch 100 for the PoE-based IoT system It is possible to prevent unstable operation or failure of the network switch 100 for the PoE-based IoT system or the IoT device 200 due to temporary overload caused by switching at the same time.

3 is a diagram showing the configuration of a network switch for a PoE-based IoT system according to an embodiment of the present invention in more detail.

As shown in FIG. 3, the network switch 100 for the PoE-based IoT system includes a power module 105, an order setting unit 110, a delay time setting unit 115, a sequential positioning control unit 120, and a PoE unit. 125, a switching unit 130, a port 135, a sensing unit 140, a monitoring unit 145, an auxiliary power supply unit 150, and the like.

In addition, although not shown in the drawing, the network switch 100 for the PoE-based IoT system includes a processor, a memory, a bus connecting them, various interface cards, etc. in terms of hardware, and the processor is installed in the memory in terms of software. Programs to be driven through are stored, and a user interface to perform operations according to commands from a user or a network, an update management unit that manages updates of various operation programs, and an interface unit for transmitting and receiving data with external devices such as databases are additionally provided. can include

The power module 105 is equipped with a rectifier, an AC-DC converter, a DC-DC converter, etc., rectifies commercial power applied from the outside through the rectifier and converts it into DC power through the AC-DC converter, , DC power of different sizes is generated by converting the converted DC power through the DC-DC converter.

When the order setting unit 110 switches the PoE network connection (that is, network connection and power supply) of each IoT device 200 connected to the network switch 100 for the PoE-based IoT system, each IoT device 200 ), an order for switching the PoE network connection is set at a time difference, and information on the set switching order is output to the sequential switching control unit 120.

At this time, the switching order for the PoE network connection may be set individually or per group based on power usage, data usage, or a combination thereof for each IoT device 200 . In addition, it may be set in a pre-programmed order according to the type of each IoT device 200.

For example, the switching order for the PoE network connection may be set according to the order of power usage or data usage of each IoT device 200 . Conversely, the order of network release and power-off may be set according to the order of decreasing power usage or data usage of each IoT device 200 .

The delay time setting unit 115 connects to the network and supplies power to each IoT device 200 from the sequential switching control unit 120 according to the order for switching the PoE network connection set through the order setting unit 110. When performing control, it performs the function of setting the switching delay time for PoE network connection for each IoT device.

To this end, the delay time setting unit 115 calculates the total power usage or total data usage of each IoT device 200, and then calculates the total power usage or total data usage and the individual IoT device 200. In preparation for power usage or data usage, a switching delay time for PoE network connection is set, and information on the set switching delay time is output to the sequential switching control unit 120 .

In addition, the order setting unit 110 and the delay time setting unit 115 according to the present invention receive data measured for each of a plurality of IoT devices by the sensing unit 140 and change the preset switching order and delay time. do.

The sequential switching controller 120 is configured according to a command for network switching of each IoT device 200 input from the user terminal 300 or the control server 400 in the network switch 100 for the PoE-based IoT system. It controls PoE switching with a time difference for each IoT device.

That is, the sequential switching control unit 120 switches each IoT device 200 with a time difference according to the switching order set by the order setting unit 110 and the switching delay time set by the delay time setting unit 115. to control it.

For example, when the sequential switching control unit 120 controls PoE switching of each IoT device 200 according to the switching order set by the order setting unit 110, one IoT device set to the highest priority is selected. All IoT devices 200 wait for the delay time set by the delay time setting unit 115 after controlling to switch PoE, and then control the IoT devices in the next order to switch over PoE and then wait for the delay time. Switching for PoE network connection is sequentially controlled.

In addition, when the sequential switching controller 120 controls PoE switching for network release and power cut of each IoT device 200 according to the switching order set by the order setting unit 110, one set to the highest priority After waiting until the power remaining in the IoT device 200 connected to the port of is completely discharged (that is, until the delay time specified in the corresponding port elapses), the PoE switching of the IoT device is controlled, and then the next PoE switching for network release and power cut-off of all IoT devices 200 is sequentially controlled by controlling the switching of IoT devices in order.

Meanwhile, the sequential switching controller 120 supplies DC power of different sizes generated by the power module 105 through the PoE unit 125 according to the DC power used by each IoT device 200. Switching can be controlled. For example, the IoT device 200 using 24V DC power is controlled to switch the PoE unit 125 capable of supplying 24V DC power, and the IoT device 200 using 12V DC power in the same way controls 12V It controls to switch the PoE unit 125 capable of supplying DC power.

The PoE unit 125 is provided for each port 135, supplies DC power generated by the power module 105 to each IoT device 200, and transmits and receives bi-directional data with each IoT device 200. to perform

The switching unit 130 switches the PoE network connection between the PoE unit 125 and each IoT device 200 based on the switching control of the sequential switching control unit 120 . That is, PoE switching is sequentially performed according to the switching order and switching delay time set based on power usage, data usage, or a combination of each of the IoT devices 200 .

The port 135 is a part to which external devices such as the IoT device 200, another network switch, and an uninterruptible power supply (UPS) are connected through a cable, and is provided in plurality.

The sensing unit 140 includes a current sensor, a temperature sensor, an ammeter, a voltmeter, and data traffic monitoring means, and measures voltage, current, temperature, traffic (amount of data), etc. supplied to each of the ports 135. and outputs data such as the measured voltage, current, temperature, and traffic to the monitoring unit 145.

The sensing unit 140 measures the data including power or traffic consumed by each IoT device while a plurality of IoT devices are connected and in service, and provides the measured data to the user through the monitoring unit 145. Provided so that commands for network switching can be modified. In addition, the sensing unit 140 provides the measured data to the order setting unit 110 and the delay time setting unit 115 so that the preset switching order and delay time can be changed.

The monitoring unit 145 monitors whether the voltage, current, and temperature of each port 135 measured by the sensing unit 140 satisfy a preset standard. At this time, the monitoring result may be provided to the user terminal 300 so that the user can check it.

In addition, the network switch 100 for the PoE-based IoT system satisfies the criteria when the voltage, current, and temperature for each port 135 do not satisfy the criteria set in advance based on the monitoring result by the monitoring unit 145. It is possible to perform control to cut off the power supply of a specific port 135 that cannot be used.

When the external commercial power supplied to the network switch 100 for the PoE-based IoT system is cut off due to a power outage or the like, the auxiliary power supply unit 150 supplies the IoT device 200 connected to each port 135 for a predetermined time. It performs the function of continuously supplying power during

Accordingly, the sequential switching control unit 120 switches each IoT device for PoE network connection according to the switching order set by the order setting unit 110 and the switching delay time set by the delay time setting unit 115. will be able to control At this time, the auxiliary power supply unit 150 may be configured by being embedded in the network switch 100 for the PoE-based IoT system, and in addition, by connecting an uninterruptible power supply (UPS) to the network switch 100 for the PoE-based IoT system can also be used

4 is a diagram illustrating sequential control of a network switch for a PoE-based IoT system according to an embodiment of the present invention.

As shown in FIG. 4 , the network switch 100 for the PoE-based IoT system is connected to the PoE unit 125 and each port 135 through the switching unit 130. Switch the PoE network connection. At this time, the network switch 100 for the PoE-based IoT system sequentially performs switching for connecting each IoT device 200 to the PoE network so that all ports 135 are not switched simultaneously.

At this time, the PoE unit 125 provided in the network switch 100 for the PoE-based IoT system is provided as many as the number of ports 135, and power is supplied for each port 135 to which the IoT device 200 is connected. Allows data transmission and reception to be performed simultaneously.

At this time, the PoE unit 125 is composed of a PSE 125a and a network driver 125b.

The PSE 125a performs a function of supplying DC power converted from externally applied AC power to each IoT device 200 .

In addition, the PSE 125a checks whether a voltage exists in a cable connecting the network switch 100 for the PoE-based IoT system and the IoT device 200, or whether each IoT device 200 is connected. You can perform a check function.

The network driver 125b is a PHY (physical layer) chip and performs bi-directional data transmission and reception with each IoT device 200 . At this time, the PHY chip refers to a chip implementing the physical layer in Ethernet communication, and is connected to the MAC chip, and performs a role of converting packets made in the upper layer into Manchester coding and differential signals in order to send them far away. In this way, it is possible to create a signal that is much faster and farther and stronger against noise than conventional serial or parallel communication.

Meanwhile, each IoT device 200 includes a PD 210 and a network driver 220 .

The PD 210 drives the IoT device 200 by receiving power supplied from the PSE 125a.

The network driver 220 is a PHY chip, and performs bidirectional data transmission and reception with the network switch 100 for the PoE-based IoT system.

5 is a waveform diagram illustrating a relationship between an amount of power and time when sequentially switching a PoE network connection for each IoT device in a network switch for a PoE-based IoT system according to an embodiment of the present invention.

Each of the IoT devices 200 is driven using power supplied through a PoE network connection from the network switch 100 for the PoE-based IoT system, and network connection is made.

At this time, when each IoT device 200 is simultaneously PoE switched in the network switch 100 for the PoE-based IoT system, the network switch 100 for the PoE-based IoT system or the IoT device 200 due to a temporary overload. Movement may become unstable or malfunction may occur.

Therefore, the network switch 100 for the PoE-based IoT system applied to the present invention must sequentially switch each IoT device 200 according to a previously set switching order and switching delay time.

For example, as shown in FIG. 5, the network switch 100 for the PoE-based IoT system having 12 ports first switches PoE to 4 ports and waits until a preset delay time elapses. When the delay time elapses, PoE switches the next four ports and then waits until the preset delay time elapses. We finish by switching the last four ports in this way to PoE.

When the switching for PoE network connection is sequentially controlled for each IoT device 200 with a time difference in this way, a plurality of IoT devices 200 are simultaneously switched to the network switch 100 for the PoE-based IoT system. Stable network connection and operation of each IoT device 200 may be performed without operation instability or failure due to temporary overload.

6 is a diagram for explaining order setting for switching a PoE network connection in a network switch for a PoE-based IoT system according to an embodiment of the present invention.

As shown in FIG. 6, the network switch 100 for the PoE-based IoT system has 8 ports, IoT devices #1 to #8 are connected to ports 1 to 8, respectively, and 8 IoT devices It is assumed that IoT device #1 consumes the most power or data, and IoT devices #2 to #8 use less power or data in that order.

In this case, the network switch 100 for the PoE-based IoT system sets the IoT device #1 that consumes the most power or data as the first priority, and then the IoT device #2 that consumes the most power or data as the second priority. Set in order, and set the switching order for PoE network connection in the order of IoT devices #3, #4, #5, #6, #7 and #8 in the same way.

In addition, the network switch 100 for the PoE-based IoT system sets the IoT device #8 with the lowest power or data usage as the first priority, and then the IoT device #7 with the lowest power or data usage as the second priority. In the same way, set the order for switching off the network and power off in the order of IoT devices #6, #5, #4, #3, #2 and #1.

On the other hand, when the IoT device 200 is newly connected to a port that is not currently in use, the network switch 100 for the PoE-based IoT system checks the power usage or data usage of the IoT device connected to the corresponding port, and then sets it in advance. You can adjust the switching order for your PoE network connections.

7 is a diagram for explaining calculation of a switching delay time in a network switch for a PoE-based IoT system according to an embodiment of the present invention.

As shown in FIG. 7, when the network switch 100 for the PoE-based IoT system performs switching for PoE network connection for each IoT device 200, the switching delay time for each IoT device 200 can be set differently. In this case, the switching delay time may be set by adding the switching on/off time and the time difference (delta T). Here, the time difference refers to the time interval between switching from one IoT device to another IoT device. Therefore, the switching delay time for each individual IoT device is the switching time for each IoT device by further considering the time difference in the switching on/off time to switch without considering the delay.

For example, IoT device #1 to IoT device #8 are connected to ports 1 to 8, respectively, and the power consumption or data consumption is the highest for IoT device #1, and gradually decreases as it goes to the next priority, and IoT device #8 It is assumed that the power usage or data usage of is the smallest, and it is assumed that sequential switching control of all IoT devices 200 takes a total of 30 seconds.

In this case, the network switch 100 for the PoE-based IoT system calculates total power usage (or data usage) of IoT devices #1 to #8 and power usage used by individual IoT devices. Subsequently, switching delay times of the IoT devices #1 to #8 are set by comparing the total power usage of the IoT devices #1 to #8 with the power usage of individual ports.

For example, if the power usage used by the IoT device #1 accounts for 20% of the total power usage, a switching delay time of 6 seconds is set for the IoT device #1 out of a total of 30 seconds set as the switching delay time. In this way, the switching delay times of the IoT devices #1 to #8 are respectively set.

Meanwhile, the network switch 100 for the PoE-based IoT system sets the switching delay time to the same time for all IoT devices, or sets the power consumption per group, in addition to the method of setting the switching delay time for each IoT device as described above. It is also possible to set the switching delay time by dividing into groups based on

Next, an embodiment of a sequential control method for a network switch for a PoE-based IoT system according to the present invention configured as described above will be described in detail with reference to FIG. 8 . At this time, the order of each step according to the method of the present invention may be changed by a user environment or a person skilled in the art.

8 is a flowchart illustrating in detail the operation process of a network switch sequential control method for a PoE-based IoT system according to an embodiment of the present invention.

As shown in FIG. 8, the network switch 100 for the PoE-based IoT system receives a network switching command for each IoT device 200 from the user terminal 300 or the control server 400 connected through the network. and confirms (S100), and determines whether the confirmed network switching command is switching for PoE network connection (ie, network connection and power supply) of the IoT device 200 (S200).

As a result of determining through the step S200, if the network switching command is switching for network connection and power supply of the IoT device 200, the network switch 100 for the PoE-based IoT system is set in advance for each IoT device ( 200) and checks the switching order (S300), and checks the switching delay time for each IoT device 200 according to the switching order (S400).

In this case, the switching order is set based on power usage, data usage, or a combination thereof for each IoT device, and the switching order may be set according to the order of power usage or data usage of each IoT device 200.

Next, the network switch 100 for the PoE-based IoT system switches the PoE network for each IoT device 200 based on the switching order for each IoT device 200 checked in step S300 and the switching delay time checked in step S400. are sequentially performed (S500). That is, sequential switching for PoE network connection is performed with a time difference (ie, delay time) for each IoT device 200 according to the set switching order and switching delay time.

However, as a result of the determination through the step S200, if the network switching command is switching for network release and power cut off of the IoT device 200, the network switch 100 for the PoE-based IoT system sets each of the previously set The switching blocking order for each IoT device 200 is checked (S600), and the switching delay time for each IoT device 200 according to the checked switching blocking order is checked (S700).

At this time, the switching blocking order is set based on the power usage, data usage, or a combination thereof for each IoT device 200, and the switching blocking order is set in order of decreasing power usage or data usage of each IoT device 200. can be set

Subsequently, the network switch 100 for the PoE-based IoT system releases the network for each IoT device 200 based on the switching blocking order for each IoT device 200 checked in step S600 and the switching delay time checked in step S700. and performs control for switching power off (S800). That is, control for switching network release and power shutdown is performed with a time difference (ie, delay time) for each port according to the set switching blocking order and switching delay time.

On the other hand, although not shown in FIG. 8, the network switch 100 for the PoE-based IoT system measures the voltage, current, and temperature supplied to each port, and the measured voltage, current, and temperature for each port are measured in advance. It monitors whether a set standard is satisfied, and if the measured voltage or current for each port does not satisfy a predetermined standard as a result of the monitoring, a function of cutting off power supply to a specific port that does not satisfy the standard is additionally performed. can

As described above, the present invention provides a switching sequence and a switching sequence set in advance based on the power consumption or data usage of each IoT device in the process of switching the PoE network connection of a plurality of IoT devices operating based on PoE in a network switch for a PoE-based IoT system. Since switching is performed with a time difference based on the switching delay time, the operation of the network switch or the IoT device is prevented from being unstable or failure occurs due to temporary overload that occurs when the plurality of IoT devices are simultaneously switched to the network switch. can do.

In addition, the present invention monitors the current, voltage, temperature, etc. for each port of the network switch for the PoE-based IoT system. , PoE-based IoT system network switch or IoT device damage or failure can be prevented.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and various modifications and other equivalent embodiments will be made by those skilled in the art in the field to which the technology belongs. You will understand that it is possible. Therefore, the technical protection scope of the present invention will be determined by the claims below.

100: Network switch for PoE-based IoT system
105: power module 110: order setting unit
115: delay time setting unit 120: sequential switching control unit
125: PoE unit 125a: PSE
125b: network driver 130: switching unit
135: port 140: detection unit
145: monitoring unit 150: auxiliary power unit
200: IoT device 300: user terminal
400: control server

Claims (10)

Sequential switching controller for controlling PoE switching with a time difference for each IoT device; and
A switching unit for switching the PoE network connection of each IoT device based on the control of the sequential switching control unit; includes,
The switching is performed sequentially according to a switching order set based on power usage, data usage, or a combination thereof for each IoT device. Network switch for PoE-based IoT system. The method of claim 1,
The network switch,
Further comprising: a sequence setting unit for setting a switching sequence for PoE network connection for each IoT device;
The order setting unit,
The network switch for a PoE-based IoT system further comprising setting an order for switching PoE network connections individually or by group according to the power usage or data usage of each IoT device. The method of claim 1,
The network switch,
Calculating the total power usage or total data usage of each IoT device, and comparing the calculated total power usage or total data usage with the power usage or data usage of the individual IoT device, and switching the PoE network connection by individual or group A network switch for a PoE-based IoT system, further comprising; a delay time setting unit for setting a delay time for IoT device switching. The method of claim 1,
The network switch,
A power module that converts commercial power applied from the outside into DC power and generates DC power of different sizes by converting the converted DC power; and
A PoE unit including a PSE for supplying the generated DC power to each of the IoT devices and a network driver for transmitting and receiving bidirectional data with each of the IoT devices;
The sequential switching control unit controls switching to supply DC power of different sizes generated by the power module through the PoE unit according to the DC power used by each IoT device. switch. The method of claim 1,
The network switch,
a sensing unit for measuring voltage, current, and temperature supplied to each port; and
Further comprising a monitoring unit for monitoring whether the measured voltage, current, and temperature of each port satisfy a preset standard,
As a result of the monitoring, if the measured voltage or current for each port does not satisfy a predetermined criterion, a network switch for a PoE-based IoT system, characterized in that to cut off power supply to a specific port that does not satisfy the criterion. In a network switch for a PoE-based IoT system, a sequential switching control step of controlling PoE switching with a time difference for each IoT device; and
A switching step of switching the PoE network connection of each IoT device based on the control; includes,
The switching is sequentially performed according to a switching order set based on power usage, data usage, or a combination thereof for each IoT device. The method of claim 6,
The method,
In the network switch for the PoE-based IoT system, an order setting step of setting a switching order for switching the PoE network connection for each IoT device; further comprising,
The order setting step,
Network switch sequential control method for a PoE-based IoT system, further comprising setting an order for switching the PoE network connection individually or by group according to the power usage or data usage of each IoT device. The method of claim 6,
The method,
In the network switch for the PoE-based IoT system, the total power usage or total data usage of each IoT device is calculated, and the calculated total power usage or total data usage is compared with the individual IoT device's power usage or data usage, A network switch sequential control method for a PoE-based IoT system, further comprising a delay time setting step of setting an IoT device switching delay time for switching individual or group PoE network connections. The method of claim 6,
The method,
In the network switch for the PoE-based IoT system, converting commercial power applied from the outside into DC power and converting the converted DC power to generate DC power of different sizes; and
Supplying the generated DC power of different sizes to each IoT device according to the DC power used by each IoT device, and performing bi-directional data transmission and reception with each IoT device; characterized in that it further comprises Network switch sequential control method for PoE-based IoT system. The method of claim 6,
The method,
In the network switch for the PoE-based IoT system, a sensing step of measuring voltage, current, and temperature supplied to each port; and
Further comprising a monitoring step of monitoring whether the measured voltage, current, and temperature of each port satisfy a preset standard,
The network switch for the PoE-based IoT system further comprises cutting off the power supply of a specific port that does not satisfy the standard if the measured voltage or current for each port does not satisfy the preset standard as a result of the monitoring Network switch sequential control method for PoE-based IoT system, characterized in that.

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